1. Introduction
The EZAIOT Smart Wi-Fi Thermostat (Model: Smart Wi-Fi Thermostat) is designed to provide intelligent temperature control for various heating systems, including electric heating, water underfloor heating, and gas boilers. It features a color VA screen, a user-friendly rotary knob for intuitive adjustments, and Wi-Fi connectivity for remote control via the Tuya/Smart Life app. This thermostat also supports voice control through popular smart home assistants like Google Home and Amazon Alexa. Key features include weekly programming, child lock, anti-freeze mode, power-off memory, and real-time weather display (Wi-Fi version only).
2. Specifications
| Attribute | Value |
|---|---|
| Brand Name | EZAIOT |
| Model Number | Smart Wi-Fi Thermostat |
| Certification | CE, WEEE |
| Origin | Mainland China |
| Supply Voltage | AC100~240V; 50/60Hz |
| Wattage | <1.5W (Wi-Fi version 1.5W Max) |
| Temperature Setting Range | 5-95°C |
| Ambient Temperature | -5-50°C |
| Switch Deviation | 0.5-10°C (Factory setting 1°C) |
| Protection Level | IP20 |
| Housing Material | Anti-Flammable PC |
| App Control | Tuya Smart / Smart Life |
| Wi-Fi Frequency | 2.4GHz (5GHz not supported) |
3. Package Contents
The package includes the following items:
- 1x Thermostat unit
- 1x Device Operation Manual
- 1x Networking Operation Manual
- 2x Mounting Screws
- 1x Floor sensor (for electric floor heating models only)
4. Setup and Installation
Important: Installation should be performed by a qualified electrician to ensure safety and proper functionality. Always turn off power at the circuit breaker before beginning any electrical work.
4.1. Dimensions
The thermostat is designed to fit a standard 86x86mm concealed wall box.
4.2. Mounting Steps
- Release Front Cover: Insert a head screw-driver into the bottom crack of the thermostat and gently pry to release the front cover.
- Connect Wires: Connect the wires to the terminal block per the wiring schematic according to wiring diagram. Suggested copper wire length is 7-9mm.
- Attach Thermostat Base: Secure the thermostat base to the wall-cassette by two mounting screws. After attaching it, make sure there is no deformation on the thermostat. Suggested torque is 0.2~0.4N.m (2.0~4.1kgf.cm).
- Re-mount Front Cover: Snap the front cover back onto the thermostat base.
4.3. Wiring Diagrams
The thermostat operates at full capacity up to 2500m above sea level. For altitudes between 2500m and 4200m, the power rating of the external load should not exceed 80% of the thermostat's rated power.
Choose the appropriate wiring diagram based on your heating system type:
4.3.1. Electric Heating (Model #716)
Connect Live (L), Neutral (N), Load Neutral (N1), Load Live (L1), and external sensor (NTC1, NTC2) as shown. The maximum current for electric heating is 16A.
4.3.2. Water Heating (Model #703)
This model supports normally-closed electric actuators, normally-open electric actuators, and three-wire electrical ball valves. Connect Live (L), Neutral (N), and the actuator/valve terminals (OPEN, CLOSE) along with the external sensor (NTC1, NTC2). Maximum current is 3A.
4.3.3. Gas Boiler (Model #723)
This model supports normally-closed electric actuators, normally-open electric actuators, and three-wire electrical ball valves, with passive linkage control and dry contact signal for boiler control. Connect Live (L), Neutral (N), and the actuator/valve terminals (OPEN, CLOSE) along with PC1 and PC2 for boiler control. Maximum current is 3A. The delay time of linkage control is adjustable.
4.4. Wi-Fi Configuration (Wi-Fi Version Only)
To connect your thermostat to Wi-Fi:
- Ensure the thermostat is powered off.
- Press and hold the Mode key (bottom-left button) for 3 seconds to enter Wi-Fi configuration mode.
- Open the Tuya Smart or Smart Life app on your smartphone.
- Follow the in-app instructions to add the thermostat. Ensure your Wi-Fi network is 2.4GHz, as 5GHz networks are not supported.
5. Operating Instructions
5.1. Display Symbols Overview
- Wi-Fi Config: Indicates Wi-Fi connection status.
- Child-lock: Indicates child lock is active.
- ECO mode: Indicates energy-saving mode is active.
- Weather forecast: (Wi-Fi version only) Displays Sunny, Cloudy, Rainy, Snowy icons.
- Sensing Temperature: Shows current room temperature (built-in sensor) or floor temperature (external sensor).
- Setpoint Temperature: The desired temperature setting.
- Heating on: Indicates the heating system is active.
- Frost Protection: Indicates anti-freeze mode is active.
- Open Window: (If applicable) Indicates an open window detected.
5.2. Basic Operations
- Power On/Off: Briefly press the Knob key (center knob) to turn the thermostat on or off.
- Time Setting: Press and hold the Mode key (bottom-left button) for 3 seconds to enter time setting. Use the Knob key to adjust the weekday and clock, then press the Mode key to confirm.
- Temperature Setting: Rotate the Knob key to increase or decrease the setpoint temperature by 0.5°C increments.
- Child Lock: Press and hold both the Mode key and ECO key (bottom-right button) simultaneously for 3 seconds to activate or deactivate child lock.
5.3. Temperature Control Modes
- Switching Modes: Briefly press the Mode key to switch between Manual Mode and Auto Mode.
- Manual Mode: The thermostat maintains the temperature set by the Knob key until manually changed again.
- Auto Mode: The thermostat follows the programmed weekly schedule. Manual adjustments in this mode are temporary and will revert to the schedule at the next programmed event.
- ECO Mode: Briefly press the ECO key to activate ECO mode. The temperature will automatically set to 18°C for energy saving.
5.4. Weekly Programming
The thermostat allows for weekly programming with up to 6 heating events per day, each with individual temperature settings. You can choose between 5+2 (weekdays + weekend), 6+1 (weekdays + one weekend day), or 7 (all days individually) programming periods.
- Press and hold the Mode key for 3 seconds to enter weekly programming settings.
- Use the Mode key to select the item to modify (weekday, clock, temperature).
- Rotate the Knob key to adjust the values.
- Press the Mode key briefly to confirm each setting and move to the next.
5.5. Smart Features (Wi-Fi Version Only)
- App Remote Control: Control your thermostat from anywhere using the Tuya Smart or Smart Life app.
- Voice Control: Integrate with Google Home or Amazon Alexa for hands-free temperature adjustments.
- Real-Time Weather Icons: The display shows current weather conditions (sunny, cloudy, rainy, snowy) for quick reference.
- Adjustable Backlight: Customize the screen brightness from 1% to 100% to suit your preference and avoid disturbance at night.
5.6. Safety Features
- Anti-Freeze Mode: Automatically activates heating if the ambient temperature drops below 5°C to prevent pipes from freezing.
- Power-Off Memory: All your settings are saved and restored automatically after a power outage.
- Child Lock: Prevents accidental changes to settings by unauthorized users.
6. Advanced Settings (For Professional Technicians)
To access advanced settings:
- Ensure the thermostat is powered off.
- Press and hold the Mode key (bottom-left button) for 3 seconds to enter advanced setting mode.
- Briefly press the Mode key again to cycle through the setting items.
- Rotate the Knob key to adjust the values.
- Press the Mode key briefly to confirm the setting.
| Code | Meaning | Default Value | Range |
|---|---|---|---|
| 1ADJ | Temperature calibration | 0°C | -9.9~9.9°C |
| 2SEN | Sensor selection | IN | IN (built-in), OUT (external), ALL (built-in & external) |
| 3LIT | External sensor upper limit | 35°C | 5~60°C |
| 4DIF | Switch deviation | 1°C | 0.5~10°C |
| 5LTP | Frost protection | OFF | ON/OFF |
| 6PRG | Weekly programming setting | 12345 | 12345 (5+2), 123456 (6+1), 1234567 (7) |
| 8DLY | Delay time of passive linkage control | 0 | 0~5min |
| 9HIT | Temperature upper limit | 50°C | 5~95°C |
| AFAC | Restore factory settings | --- | Press and hold for 3 seconds |
7. Maintenance
The EZAIOT Smart Wi-Fi Thermostat requires minimal maintenance. To ensure optimal performance and longevity:
- Cleaning: Gently wipe the screen and exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid Obstructions: Ensure the thermostat is not covered by furniture, curtains, or other objects that could obstruct its temperature sensor.
- Software Updates: Periodically check the Tuya Smart/Smart Life app for any available firmware updates for your thermostat to ensure you have the latest features and bug fixes.
8. Troubleshooting
8.1. Sensor Failure
If the thermostat displays an "Er0" or "Er1" error, it indicates a sensor issue. The thermostat will remain powered off until the error is resolved.
- Er0: Built-in sensor is short-circuited or disconnected.
- Er1: External sensor is short-circuited or disconnected.
Action: Check the sensor connections and ensure they are correctly wired according to the sensor selection setting in advanced settings (2SEN). If the issue persists, contact customer support.
8.2. Common Questions & Answers
- Q: Can it work without Wi-Fi?
- A: Yes. It supports manual operation directly on the thermostat.
- Q: Can it cool as well as heat?
- A: No. It is designed only for heating.
- Q: Is it battery powered?
- A: No. It is powered by 100V–240V AC.
- Q: Does the screen stay on all the time?
- A: Yes, but you can adjust the backlight brightness from 0%–100%, including turning it completely off.
- Q: Can it be embedded in a wall?
- A: Yes. It can be installed in a standard 86×86mm concealed wall box.
- Q: How do I wire it?
- A: Please refer to the detailed wiring diagrams in Section 4.3 of this manual.
- Q: Does it work with 5GHz Wi-Fi?
- A: No. It supports only 2.4GHz Wi-Fi.
- Q: Does it have a power-failure memory?
- A: Yes. It saves your settings and will automatically reconnect to the app after power is restored.
- Q: Is there any noise while operating?
- A: No. The thermostat operates quietly.
9. User Tips
- For optimal energy savings, utilize the weekly programming feature to set different temperatures for various times of the day based on your schedule.
- The ECO mode is a quick way to save energy by setting the temperature to 18°C with a single press.
- If you experience connectivity issues, ensure your Wi-Fi router is broadcasting on the 2.4GHz band and that the thermostat is within range.
- The adjustable backlight is useful for bedrooms; you can dim it or turn it off completely for undisturbed sleep.
10. Warranty and Support
For detailed warranty information, technical support, or service inquiries, please refer to the official user manual PDF available at: User Manual (PDF). You may also contact EZAIOT customer service through their official channels.